| 摘要 |
<p>PURPOSE:To make tape take-up tension approximately constant and to prevent unstable traveling at the time of rewinding reproduction by giving braking force to a reel base in accordance with the tape take-up tension and adjusting take-up torque of the reel base. CONSTITUTION:Anticlockwise turning force Ms by a tension spring 19 and clockwise turning force Mt by take-up tape tension of the reel base 14 on account of pressurized contact of the tape 28 with a tension post 16 are worked on a tension arm 117. Therefore, turning force as a result of subtracting Ms from Mt is worked clockwise on the tension arm 117, and a guide groove 143 is energized to move a band pin 123 along a fixed guide groove 142 in the receding direction from a spindle 26. Then, a tension band 122 is pulled by the band pin 123 to give braking force to a brake part 37, and this braking force is fed back to the reel base 14. That is, torque for taking up the tape 28 of the reel base can be adjusted in accordance with a winding diameter of the tape 28 taken up to the reel base 14.</p> |
